Official NHA Assessment
Race 3: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 96 HANDICAP (Open)
Line Horse
Total Surrender
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Tamarisk Tree 5 59.5 1 0.00 0.0 95 91 95 +0 2 Vesuvio 5 55.5 2 0.25 0.0 87 83 83 -4 3 Total Surrender 5 55.5 3 2.35 0.0 87 87 87 +0 4 Hawkbill 4 59.0 4 4.75 2.5 94 85 85 -9 5 Douglas Dragon 3 52.5 5 5.00 5.0 81 67 71 -10 6 Rule Book 6 60.0 6 6.40 0.0 96 92 92 -4 7 Jordan 4 54.5 7 6.80 2.5 88 76 78 -10 8 Robert Browning 3 48.0 8 8.30 5.0 82 58 72 -10 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Tamarisk Tree | 95 | 105 | 95 | +10 | 0.0 | - | |
| 2 | Vesuvio | 87 | 85 | 83 | +2 | 0.0 | - | |
| 3 | Total Surrender Line | 87 | 74 | 87 | -13 | 0.0 | ||
| 4 | Hawkbill | 94 | 100 | 85 | +15 | 2.5 | - | |
| 5 | Douglas Dragon | 81 | 89 | 71 | +18 | 5.0 | - | |
| 6 | Rule Book | 96 | 92 | 92 | ✓ Match | 0.0 | - | |
| 7 | Jordan | 88 | 88 | 78 | +10 | 2.5 | - | |
| 8 | Robert Browning | 82 | 87 | 72 | +15 | 5.0 | - |
Assessment Methodology
Calculation Steps:
- Identify Line Horse - consistent performer used as reference
- Calculate WFA Allowance based on age, distance, and month
- Apply Drag Adjustment for beaten margin
- Calculate Actual Weight Performance:
Weight - Drag - WFA - Compare to Line Horse to determine race rating
- Apply special rules (maiden caps, layoff allowance)
Key Formulas:
- Drag Effect: Varies by distance (see Benchmarks page)
- 1 length ≈ 1kg at 1 mile (1600m)
- WFA Scale: Based on Admiral Rous's 1855 table
- Rating Points: 1kg = 2 rating points